KR19980061584A - Position sensor decomposition rate increasing device and method - Google Patents

Abstract

The present invention relates to a servo controller, and more particularly, to an apparatus and method for increasing a position sensor decomposition rate, which is applied to a control device using a position sensor to calculate position data more subdivided than that of a position sensor to improve the performance of the control apparatus. A first flipper that receives the LSB signal of the position sensor, outputs and stores the flip-flop 11A, 11B, and receives the data of the flip-flop 11A, 11B. When the status signal of the gate 12, the first NOA gate 12 is low (L), the first counter 13 is enabled (EN) and outputs LSB amplitude data, and the clock signal is input to the counter. Enable (EN) when the clock generator 20, the second NOR gate 31 for NORing the LSB signal of the position sensor, and the output signal of the second NOR gate 31 are inverted and inputted Second car outputting the increased position data (LSB holding time) By configuring the rotor 32, the present invention configures a circuit that can increase the decomposition rate of the position sensor, thereby calculating the position data more subdivided than the decomposition rate of the position sensor to improve the control performance of the control device in which the position sensor is used. As a result, the cost is reduced by using a low resolution sensor.

Description

Position sensor decomposition rate increasing device and method

The present invention relates to a servo controller, and more particularly, to an apparatus and method for increasing a position sensor decomposition rate, which is applied to a control device using a position sensor to calculate position data more subdivided than that of a position sensor to improve the performance of the control apparatus. will be.

In the case of an encoder used as a position sensor, a resolution ratio is determined in a sensor, and there are many price differences between a high resolution sensor and a low resolution sensor, and thus an analog type position such as a resolver or a synchro is used. Sensors are more expensive as the transducer for converting them to digital values has higher resolution.

In addition, attempting to increase the resolution leads to high sensor and transducer costs. Nevertheless, there is a limitation that can no longer be subdivided, and all current control devices employ microprocessors, and because the output of the position sensor is digitalized, Position information below the decomposition rate of the sensor or transducer cannot be calculated or detected, and if the decomposition rate of the sensor is low, the low speed driving performance of the control device is degraded.

As described above, if the resolution rate of the conventional position sensor is increased, the cost of the sensor and the transducer becomes expensive, and since the output of the position sensor is digitalized by using a microprocessor in the control device, the position below the resolution ratio of the position sensor or the transducer is reduced. Information cannot be calculated or detected, and if the sensor's decomposition rate is low, there is a problem that the low speed driving performance of the control device is degraded.

Accordingly, an object of the present invention solves the above problem by configuring a circuit to increase the decomposition rate of the position sensor in order to improve the performance of the control device to which the position sensor is applied.

As a specific means of the present invention for achieving the above object,

When the start signal is input and the LSB amplitude calculation is started and completed, the status becomes low (L) to read the LSB amplitude data, the position data and the LSB holding time, and then the forward rotation (CW). This is achieved by calculating the position data of position data + (n / N * position sensor resolution) or the position data of position data + (n / N * position sensor resolution).

1 is a circuit diagram of the position sensor decomposition rate increasing apparatus of the present invention.

2 is an operation timing diagram for FIG. 1.

Figure 3 is a signal flow diagram of the position sensor decomposition rate increasing method of the present invention.

<Explanation of symbols for main parts of drawing>

10: LSB amplitude calculation circuit section 11A, 11B: flip-flop

12,31: Noah Gate 13,32: Counter

20: clock generator 30: resolution increase counter circuit

LSB: Least Significant Bit

EN: Enable CLR: Clear

CLK: Clock

Hereinafter, described in detail with reference to the accompanying drawings, preferred embodiments of the present invention.

1 is a circuit diagram of an apparatus for increasing a resolution rate of a position sensor according to the present invention, as shown therein, a deflip-flop 11A and 11B for receiving and outputting and storing an LSB signal of a position sensor, and the deflip-flop 11A. The first NOA gate 12 for receiving the data of 11B and NORing and the status signal of the first NOA gate 12 are enabled when the signal is low (L) to enable LSB amplitude data. A first counter 13 for outputting, a clock generator 20 for inputting a clock signal to the counter, a second NOR gate 31 for NORing the LSB signal of the position sensor, and the second NOR When the output signal of the gate 31 is inverted and input, it is configured as a second counter 32 that is enabled (EN) and outputs increased position data (LSB holding time). The operation and effects thereof will be described in detail as follows. same.

The amplitude calculation circuit unit 10 calculates the width of the LSB (Least Significant Bit) and extracts the LSB width using the flip-flops 30 and 40 and the gate device 50, and the counter 60 is shown in FIG. 2. Count as the oscillator 70 output as in (C).

In addition, the operation starts with a start signal, and the decomposition rate increase counter circuit 20 counts the LSB holding time at the time of reading the position data, and whenever the state of the LSB changes, the counter 80 is initialized as shown. Is counted to the output of the oscillator 70.

Therefore, the LSB width of the position sensor is calculated, the LSB holding time at the time of reading the position data is calculated, and the decomposition rate is further increased by calculating the granular position data more than the LSB which is the minimum decomposition unit.

Figure 3 is a signal flow diagram of the position sensor decomposition rate increasing method of the present invention, when the start (start) signal is inputted and the LSB amplitude calculation is completed, the status is low (L), the LSB amplitude data, position data and LSB holding time Read is done in steps (S1-S5), and after forward rotation (CW), the position data of position data + (n / N * position sensor resolution) is calculated, or position data + (n / N * position sensor Step S6-S8 to calculate the position data of the resolution).

By using the LSB amplitude calculation circuit and the resolution increasing counter circuit, accurate position data is calculated to improve the performance of the control apparatus.

As described in detail above, the present invention configures a circuit that can increase the decomposition rate of the position sensor, thereby calculating the position data more subdivided than the decomposition rate of the position sensor, thereby improving the control performance of the control device using the position sensor, and The use of a resolution sensor has the effect of reducing costs.

Claims (3)

A first flip-flop (11A) 11B for receiving the LSB signal of the position sensor and outputting the same and storing the LSB signal; and a first no-gate (NOR) for receiving the data of the flip-flop (11A) 11B. 12), a first counter 13 that is enabled (EN) and outputs LSB amplitude data when the status signal of the first NOA gate 12 is low (L), and a clock generator that inputs a clock signal to a counter. 20, the second NOR gate 31 for NORing the LSB signal of the position sensor, and when the output signal of the second NOR gate 31 is inverted and input, are enabled (EN) and increased. Position sensor decomposition rate increasing device, characterized in that consisting of a second counter 32 for outputting the position data (LSB holding time). The apparatus of claim 1, wherein the second counter is initialized whenever the state of the LSB changes. When the start signal is input and the LSB amplitude calculation is started and completed, the status becomes low (L) to read the LSB amplitude data, the position data and the LSB holding time (S1-S5). In the forward rotation (CW), the position data of position data + (n / N * position sensor resolution) is calculated, or the position data of position data + (n / N * position sensor resolution) is calculated (S6-S8). Position sensor decomposition rate increase method, characterized in that made.